Lubricating device for plug-cocks.



E. MARTIN. LUBRIGATING DEVICE IOB. PLUG cooKs, APP'LIOATIOH FILED APB. 16, 1913.

? 1,O69,1 56. Patented Aug. 5, 1913.

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EMILE MARTIN, or onENoBLE, rnnncn LUBRIGATING DEVICE FOR PLUG-COCKS.

Specification of Inttetslatent. Application filed April '16, 1913. Serial No. 761,408.

Patented Aug. 5,1913.

i Tdizll whom it may concern sents a section of the lower part of the p Fig.

The grooves. 2,

Be it known that I, EMILE MARTIN, a citizen of the French Republic, residing at Grenoble, in the Republic of France, have invented certain new and useful Improve ments in Lubricating Devices for Plug- Cocks, of which the following is a specification.

A lubricating device for the permanent and automatic lubrification of the parts of plug cocks which are in contact, the lubrification being efiected without dismounting the cook.

Fig. 5 is a section on line A-A of Fig. 1.

6 represents a groove.

The casing 1 of the cock has four rooves 2, 2, 2, 2 which are parallel with t e generatin line of the plug. The two grooves 2, 2 ave an extension 3 at the lower end as shown in Figs. 2 and 6, said extensions serving as inlets for the lubricant which comes from the reservoir 13 and flows into the annular space 14 and from there into the four grooves. The ends of the grooves 2, 2 are however covered by the washer 10. 2, 2", 2 terminate in the annular roove 4 which is perfectly plane and stands perpendicular to the axis of the plug. The casing has at its lower end a threaded part 5 upon which the reservoir 13 for the lu ricant is screwed.

The plug 7 has a threaded extension 8 at its lower end which contains a cavity 9 designed to form an air chamber for the air under pressure which is necessary for effect- -ing the automatic lubrification. This extension 8 is surrounded b a washer 10 with indentations 10 arrange in such amanner that the extensions 3 of the grooves 2*, 2 are covered when the port 11 of the plug moves before said grooves whereby the inthe shapes fiow of lubricant into the port is prevented. The washer 10 is fixedby means of a conical nut 12.

The operation of this cock is as follows When the plug 7 has been inserted in the cavity of the cook the washer 10 is put in place and fixed b the conical nut 12 which is moderately tightened whereupon the reservoir 13 which has been filled with the lubricant is screwed upon the threaded extension 5 of the casing. The lubricant which almost completely fills the reservoir 13 is in contact with the lower end of the plug uncovered b the indentations 10 of the washer and izlrther with said washer and itsnut. The. lubricant cannot escape through the threaded part 5 and as too large a quantity of lubricant is forced out of the reservoir it collects in the chamber 9 compressing the air contained in said chamber. The air under pressure supplies the power for forcing out the lubricant into the grooves 2, 2 according to the consumption. As only very little lubricant is required for the cook a continuous and automati'c 'lubrification is insured;

It is advisable to occasionally screw up the reservoir 13. In order to compensate for the wear of the plug a washer of the.

Belleville type can be inserted between the washer 10 and the nut 13. Theecock being continuously lubricated will last a very long time without any repairs. It is evident that and dimensions of the different parts can be modified without departing from the idea of the invention.

I claim I In an improved plug cock with permanent and automatic lubrification, in combination, a cock casing having fourverticahgrooves two of which have an extension at the lower end, said casin having an annular groove at the lower en a threaded extension'at the. lower end of said casing, a plug positioned within said casing, a threaded hollow extension at the lower end of said plug, a washer having indentations mounted upon said lower extension of the plug, a conical nut screwed upon said lower extension and pressing the washer against the bottom of said annular groove of the casing, and a vertical grooves, substantially as described reservoir for lubricant screwed upon said and shown and for the purpose set forth. 10 threaded extension of the casing so that the In Witness whereof I have hereunto set lubricant will enter the hollow portion of my hand in the presence of two witnesses.

said extension of the plug and compress the EMILE MARTIN. air contained in said hollow which in its Witnesses:

turn forces the lubricant through the in- A. GUERREL,

dentations in said washer and into said E. MARTIN. 

